EP0126839A1 - Reclining chair - Google Patents

Reclining chair Download PDF

Info

Publication number
EP0126839A1
EP0126839A1 EP84100763A EP84100763A EP0126839A1 EP 0126839 A1 EP0126839 A1 EP 0126839A1 EP 84100763 A EP84100763 A EP 84100763A EP 84100763 A EP84100763 A EP 84100763A EP 0126839 A1 EP0126839 A1 EP 0126839A1
Authority
EP
European Patent Office
Prior art keywords
frame
back rest
fixed
base frame
gas spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP84100763A
Other languages
German (de)
English (en)
French (fr)
Inventor
Uredat Neuhoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEIKO INDUSTRIAL Co Ltd
Meiko Ind Co Ltd
Original Assignee
MEIKO INDUSTRIAL Co Ltd
Meiko Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEIKO INDUSTRIAL Co Ltd, Meiko Ind Co Ltd filed Critical MEIKO INDUSTRIAL Co Ltd
Publication of EP0126839A1 publication Critical patent/EP0126839A1/en
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03216—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by fluid means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder

Definitions

  • This invention relates to a chair of so called reclining type capable of adjusting and fixing freely an angle of inclination of a back rest and a seat plate by means of a gas spring and more particularly, to a chair comprising a stationary frame fixed to a pole brace erected on legs, a back rest frame for mounting a back rest, a base frame for mounting a seat plate, an inclination adjusting mechanism for tilting and fixing the back rest at an optional angle in the condition where a vertical motion of the front portion of the base frame is small and slidably shif.ting the base frame in backward direction by following the inclination of the back rest frame, and a lever releasing keeping mechanism for keeping the inclination adjusting mechanism in free condition.
  • the chair of the construction in which the seat plate and the back rest were built in an integral unit and the unit was capable of reclining backward had been proposed, but in the chair having the foregoing construction, the reclining occurs centering around the pole brace as fulcrum which supported the center of the seat plate, the front end of the seat plate rose according to the tilting of the seat plate, and as the result, the feet floated or the seating became uncomfortable.
  • This invention is to provide a chair in which the stationary frame and the back rest frame and the base frame are mutually and axially fixed to be interlocked, and the operations of the back rest frame and the base frame are adjusted and controlled by the gas spring, whereby the back rest frame and the base frame are reclined and fixed simultaneously and steplessly.
  • this invention is to provide a comfortable chair having the construction in which the stationary frame and the back rest frame and the base frame are mutually interlocked and a rear portion of the base frame is lowered centerinq around a front end portion of the base frame as the fulcrum, whereby the vertical motion of the front edge of the seat plate is minimized and as the result, how much the back rest and the seat plate are changed, the person can sit on the chair always in comfortable posture and moreover when the back rest is reclined backward, there is no problem of floating of the feet which has eliminated the conventional drawbacks.
  • this invention has eliminated inconveniences of turning up of shirts of the person in the process of reclining the back rest backward as found in the conventional chair by forming the construction in which the base frame follows slidably the reclining of the back rest when the back rest is reclined backward which allows almost no change of the gap between the back rest and the seat plate.
  • this invention has.provided a chair in which a lever releasing keeping mechanisms provided with a stopper member for holding the push valve in open condition is provided on an operation lever for switching the push valve of the gas spring so that the chair can be used in either way, namely, in case the back rest and the seat plate are retained in fixed condition and in case the back rest and the seat plate are retained in free condition, and also, in case the reclining of the back rest and the seat plate is set in free condition, the reclining of the back rest and the seat plate follows according to the posture of the body which changes the angle of inclination freely.
  • the chair of this invention which is represented by an ordinary letter C comprises leg portions 2 provided with a pole brace 1, a stationary frame 3 fixed to an upper end of the pole brace 1, a back rest frame 5 for mounting a back rest 4, and a base frame 7 for mounting a seat plate 6, and the stationary frame 3 and the back rest frame 5 and the base frame 7 are mutually and axially fixed to be reclined interlockingly, and the base frame 7 is provided with an inclination adjusting mechanism for lowering the rear portion of the base frame 7 by centering around the front portion of the seat plate 6 as the fulcrum, and tilting and fixing the base frame 7 and the back rest frame 5 simultaneously and steplessly at an optional angle, and an operation lever 8 for operating the inclination adjusting mechanism is provided with a lever releasing keeping mechanism for keeping the inclination adjust: ing mechanism in free condition.
  • Holes 9 and 9 are perforated on corner portions of rear parts of side surfaces 9 and 9 of the stationary frame 3.
  • the lower front end portion 5a of the back rest frame 5 is curved, and holes 11, 11, 12, 12 are perforated toward the front end curved portion 5a and the bent portion 5b, and the back rest frame 5 is axially fixed to the stationary frame 3 by inserting a shaft 13 through the holes 11, 11 of the front end portion 5a and the holes 10 and 10 of the stationary frame 3.
  • the back rest frame 5 and the base frame 7 are set in place and axially fixed by inserting pins 15 and 15 to the holes 12 and 12 toward the bent portion 5b and bearing portions 14 and 14 projecting on the rear end portion of the base frame 7.
  • the base frame 7 is formed by a channel member for shaping both side portions and rear portion along an inner edge in hook shape so that the front edge portion is formed in a frame of flat rectangular shape as a whole by a receiving portion 19 having side walls 16, 16 and bottom wall 17 and front wall 18, and bearing members 20, 20, 20', 20' are erected at a predetermined interval on a bottom wall 17 of the receiving portion 19.
  • a horizontal shaft 21 is axially supported by these bearing members 20, 20, 21', 21'.
  • arm members 22 and 22 are projected, and almost horizontal long holes 23 and 23 perforated on the arm members 22 and 22 are formed between the side walls 16 and 16 and the bearing members 20' and 20', and the horizontal shaft 21 is inserted through the long holes 28 and 23.
  • Reference numeral 24 is a gas spring for connecting the stationary frame 2 and the horizontal shaft 21.
  • the gas spring 24 is constructed in such way that when a knob 27 of a push valve 26 projecting in one part of a cylinder 25 is pressed, the inside of the cylinder partitioned by a piston (not shown) becomes the condition where the high pressure gas is shiftable and the locked condition is released, and at this time, in case the external force applied to a piston rod 28 is larger than the gas pressure, the piston rod 28 is pushed into the cylinder 25, and in case the external force is smaller, the piston rod 28 is pushed out from the cylinder 25 inversely.
  • T ip of the piston rod 28 of the gas spring 24 is fixed pivotally to the inside wall of the stationary frame 3 in the embodiment of this invention, and a fork member 30 fixed to the tip of the push valve 26 is pivotally fixed to the horizontal shaft 21, and a knob 27 projects to the center of the fork member 30.
  • An upper end of a pressing member 31 whose side surface is L-shape is pivotally fixed 32 between the bearing member 20 and 20' that correspond to the fork member 30, and the full surface of the pressing member 31 and the knob 27 are arranged always in contact.
  • the operation lever 8 is bent in flat U-shape, and a pivotal portion 33 is axially supported on the receiving portion 19 so as to move like seesaw, and its one end is disposed on the upper surface of the rear end of the pressing member 31, and.the other end projects to the outside of the base frame 7 from a notch 34 provided on the side wall 16 of the receiving portion 19.
  • the inclination adjusting mechanism of the base frame 7 and the back rest 4 is constructed in such way that the horizontal shaft 21 axially supported on the front portion of the base frame 7 is made to pass through the almost horizontal long hole 23 perforated in the front part of the stationary frame 3, and one end of the gas spring is pivotally fixed to the inside'wall of the stationary frame 3, and the other end is pivotally fixed to the horizontal shaft 21, and the push valve 26 of the gas spring 24 is made to open or close by the operation lever 8.
  • the chair of this invention in the normal condition is such that even if the force is applied to the back rest frame 5, the gas spring 24 is locked so that the transfer of the base frame 7 is prevented, and accordingly, the back rest frame 5 is not turned.
  • the operation lever 8 is shown in the mounted condition on the base frame 7, it is not limited to this embodiment, and for example, in case the operation lever 8 is mounted on the stationary frame 2, the push valve 26 may be fixed to the inside wall of the stationary frame 2 and the piston rod 28 may be pivotally fixed to the horizontal shaft 21 correspondingly.
  • the operation lever releasing keeping mechanism for keeping the open condition of the push valve 26 of the gas spring 24 and keeping the inclination adjusting mechanism in free condition may be formed by mounting a stopper member 35 that is movable in axial direction on the operation lever 8.
  • a cylinder portion 36 having U-cross section of the stopper member 35 is loosely fitted to the outer periphery of the operation lever 8, and furthermore, stopper pins 37 and 37 are placed over the open upper surface and is shiftable between a button member 38 fixed to the outside end of the operation lever 8 and the side wall 16 of the receiving portion 19.
  • a wedge member 39 projects which is capable of fitting to the gap between the notch 34 of the receiving portion 19 and the lower surface of the operation lever 8 which is produced at the time when the push valve 26 is in the open condition after lifting the operation lever 8.
  • numeral 40 is a turning preventing member projecting integrally from the upper surface of the stopper member 35, and is placed over the upper surface of the button member 38.
  • the stopper member 35 is slid to the side of the button member 38 while lifting slightly the operation lever 8, and the wedge member 39 is pulled from the space between the operation lever 38 and the notch 34, and when the hand is off the operation lever 8, the push valve 26 is closed by the restoring force of the knob 27, and the gas spring 24 is locked.
  • a lever 40 projecting to the opposite side of the operation lever 8 is provided for vertically moving the seat plate 6, and when the outside end of the lever 41 is vertically moved, a lever bar 42 pivotally fixed to the horizontal shaft 21 turns in anti-clockwise direction in Fig. 5, and a pressing lever 43 pivotally fixed to the stationary frame 3 is turned by the foregoing turning of the bar 42 in the clockwise direction in the same'drawing, and a knob 45 of the gas spring 44 built in the pole brace 1 is pressed, and the locking of the gas spring 44 is released, and the seat plate 6 can be moved vertically.
  • this invention is constructed in such way that the stationary frame and the back rest and the base frame are mutually fixed to be interlocked, and the interlocking movement is controlled by the gas spring so that the back rest frame and the base frame are simultaneously and steplessly on the tilt and are fixed.
  • the movement of the base frame is the tilting movement centering around the horizontal shaft as the fulcrum, the vertical movement of the front edge of the seat plate is small, and therefore, the conventional drawback of floating of the feet which occurs when the back rest is on the tilt backward is eliminated, and also, when the back rest frame is on the tilt backward, the base frame slides by following the tilting movement so that the gap between the back rest and the seat plate is almost not changed, and accordingly, the conventional inconvenience of turning up of the shirt in the process of the tilting of the back rest backward has been eliminated, and as the result, this invention provides a chair being comfortable to sit on.
  • the seat plate or the back rest can be freely on the tilt by following the change of the posture of the person at a recess, and is useful in releasing the spiritual tension, and also, when the stopper member is drawn toward the side of the button member, the seat plate or the back rest can be fixed, and the chair can be adjusted to meet the desk work whereby the person can sit on the chair of the invention in comfortable posture.
EP84100763A 1983-05-10 1984-01-21 Reclining chair Ceased EP0126839A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP82101/83 1983-05-10
JP58082101A JPS59207112A (ja) 1983-05-10 1983-05-10 椅子

Publications (1)

Publication Number Publication Date
EP0126839A1 true EP0126839A1 (en) 1984-12-05

Family

ID=13765020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100763A Ceased EP0126839A1 (en) 1983-05-10 1984-01-21 Reclining chair

Country Status (4)

Country Link
US (1) US4537445A (ja)
EP (1) EP0126839A1 (ja)
JP (1) JPS59207112A (ja)
CA (1) CA1205735A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0489961A1 (de) * 1990-12-13 1992-06-17 Christof Stoll GmbH & Co KG Neigungsvorrichtung für ein Sitzmöbel
EP0593881A1 (de) * 1992-10-21 1994-04-27 F. Martin Steifensand Sitzmöbel- und Tischfabrik GmbH & Co. KG Sitzträger für Sitzmöbel
WO1999035939A1 (en) * 1998-01-16 1999-07-22 Miotto International Company Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair
US6386634B1 (en) 1992-06-15 2002-05-14 Herman Miller, Inc. Office chair
ES2333768A1 (es) * 2009-07-21 2010-02-26 Actiu Berbegal Y Formas, S.A. Silla de oficina.
GB2544284A (en) * 2015-11-10 2017-05-17 Davidhugh Ltd Release mechanism

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU572545B2 (en) * 1983-08-09 1988-05-12 Pledge Office Chairs Ltd. Tilting mechanism for a chair
JPS6072647U (ja) * 1983-10-25 1985-05-22 チトセ株式会社 椅子の背部もしくは座部の揺動状態維持装置
CH666171A5 (de) * 1984-10-03 1988-07-15 Giroflex Entwicklungs Ag Stuhl mit rueckwaerts neigbarem sitz- und rueckenlehnentraeger.
DE3537203A1 (de) * 1984-10-24 1986-04-24 Klöber GmbH & Co, 7770 Überlingen Arbeitsstuhl mit neigungsmechanik von sitzschale und rueckenlehne
US4744603A (en) * 1986-04-10 1988-05-17 Steelcase Inc. Chair shell with selective back stiffening
US5567012A (en) * 1986-04-10 1996-10-22 Steelcase, Inc. Chair control
DE3617539C1 (de) * 1986-05-24 1987-07-23 Grammer Sitzsysteme Gmbh Sitz mit verstellbarer Sitzplatte und neigbarer Rueckenlehne
IT206947Z2 (it) * 1986-06-12 1987-10-26 Pro Cord Srl Sedia con schienale articolato
US4840426A (en) * 1987-09-30 1989-06-20 Davis Furniture Industries, Inc. Office chair
US4889384A (en) * 1988-07-10 1989-12-26 Leggett & Platt, Incorporated Knee-action chair control
DE3835003A1 (de) * 1988-10-14 1990-04-19 Guenther Kuhn Sessel oder stuhl, insbesondere buerosessel oder -stuhl
US4979778A (en) * 1989-01-17 1990-12-25 Brayton International, Inc. Synchrotilt chair
US5106157A (en) * 1989-03-01 1992-04-21 Herman Miller, Inc. Chair height and tilt adjustment mechanisms
US5318345A (en) * 1991-06-07 1994-06-07 Hon Industries, Inc. Tilt back chair and control
ES2060507B1 (es) * 1991-06-25 1997-04-16 Normalien Srl Dispositivos adecuados para la inclinacion del respaldo y del asiento de sillas y sillones.
US5203853A (en) * 1991-09-18 1993-04-20 Herman Miller, Inc. Locking chair tilt mechanism with torsion bar
IL103477A0 (en) * 1992-10-20 1993-03-15 Paltechnica Nitzanim Office and like chairs
US5577807A (en) * 1994-06-09 1996-11-26 Steelcase Inc. Adjustable chair actuator
US5782536A (en) * 1995-02-17 1998-07-21 Steelcase Inc. Modular chair construction and method of assembly
US5765914A (en) * 1995-06-07 1998-06-16 Herman Miller, Inc. Chair with a tilt control mechanism
US5979984A (en) * 1997-10-24 1999-11-09 Steelcase Development Inc. Synchrotilt chair with forwardly movable seat
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
US6102477A (en) * 1998-03-11 2000-08-15 Hon Technology Inc. Chair with tilt limiter
DE19849522A1 (de) * 1998-10-21 2000-04-27 Drabert Gmbh Bürostuhl mit einer Sitzneigungsverstellung
US6224155B1 (en) 1999-01-12 2001-05-01 Steelcase Development Inc. Vertical height adjustment mechanism for chairs
CA2302063C (en) * 2000-03-23 2010-08-17 Cke Technologies Inc. Ergonomic chair
US6609755B2 (en) * 2001-06-15 2003-08-26 Hon Technology Inc. Ergonomic chair
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair
ITMI20022194A1 (it) * 2002-10-16 2004-04-17 Icf Spa Sedia avente sedile e schienale mobili.
US7147285B2 (en) * 2004-01-20 2006-12-12 Tung Yu Oa Co., Ltd. Reclining apparatus for chair
CN1984583A (zh) * 2004-06-14 2007-06-20 维特拉专利股份公司 带有同步机构的椅子
CA2581206C (en) * 2004-09-22 2009-11-24 Okamura Corporation Back rest tilting device in reclining chair
DE102005017143B4 (de) * 2005-04-13 2007-06-21 Bock 1 Gmbh & Co. Kg Vorrichtung zur Sitzneigeverstellung eines Stuhles
CA2676552C (en) 2007-01-29 2012-04-17 Herman Miller, Inc. Seating structure and methods for the use thereof
US20100141002A1 (en) * 2008-06-04 2010-06-10 Kurrasch Andrew J Biasing mechanism
CH701715A2 (de) * 2009-08-26 2011-02-28 Vitra Patente Ag Mechanik für einen Stuhl.
JP5085635B2 (ja) * 2009-12-28 2012-11-28 コクヨ株式会社 椅子
JP2012135398A (ja) * 2010-12-27 2012-07-19 Kokuyo Co Ltd 椅子
JP6009891B2 (ja) * 2011-11-04 2016-10-19 株式会社岡村製作所 椅子
NO339052B1 (no) * 2014-10-27 2016-11-07 Sykkylven Staal As Anordning ved sittemøbel
US9648957B2 (en) * 2015-08-05 2017-05-16 Dongguan Kentec Office Seating Co., Ltd. Chair with back tilt adjustment structure
DE202017100480U1 (de) 2017-01-30 2018-05-03 Armin Sander Sitzmöbel, insbesondere Bürostuhl
WO2019014291A1 (en) * 2017-07-12 2019-01-17 Union Design Development LLC CHAIR
US11589678B2 (en) 2019-01-17 2023-02-28 Hni Technologies Inc. Chairs including flexible frames
EP4268676A3 (en) 2019-02-21 2024-02-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11641950B2 (en) * 2020-06-05 2023-05-09 Industrial Woodworking Corporation Height adjustable bassinet

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US2321385A (en) * 1941-06-16 1943-06-08 Sikes Company Tilting chair
GB558309A (en) * 1941-10-01 1943-12-30 Bassick Co Improvements in or relating to posture chairs
DE1297306B (de) * 1965-07-23 1969-06-12 Dare Inglis Products Ltd Kippstuhl

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DE2733322C3 (de) * 1977-07-23 1980-08-07 Protoned B.V., Amsterdam Arbeitsstuhl
DE2846360A1 (de) * 1978-10-25 1980-05-08 Drabert Soehne Sitzmoebel, insbesondere buerodrehstuhl mit neigungsverstellung
US4314728A (en) * 1980-05-01 1982-02-09 Steelcase Inc. Chair control
US4432582A (en) * 1981-12-17 1984-02-21 Wilkhahn-Wilkening & Hahne Gmbh & Company Chair with means for adjusting the inclination of the backrest

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321385A (en) * 1941-06-16 1943-06-08 Sikes Company Tilting chair
GB558309A (en) * 1941-10-01 1943-12-30 Bassick Co Improvements in or relating to posture chairs
DE1297306B (de) * 1965-07-23 1969-06-12 Dare Inglis Products Ltd Kippstuhl

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0489961A1 (de) * 1990-12-13 1992-06-17 Christof Stoll GmbH & Co KG Neigungsvorrichtung für ein Sitzmöbel
US5294178A (en) * 1990-12-13 1994-03-15 Christof Stoll Gmbh + Co Kg Tilt device for seat furniture
US6386634B1 (en) 1992-06-15 2002-05-14 Herman Miller, Inc. Office chair
EP0593881A1 (de) * 1992-10-21 1994-04-27 F. Martin Steifensand Sitzmöbel- und Tischfabrik GmbH & Co. KG Sitzträger für Sitzmöbel
WO1999035939A1 (en) * 1998-01-16 1999-07-22 Miotto International Company Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair
US6213552B1 (en) 1998-01-16 2001-04-10 Miotto International Company Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair
ES2333768A1 (es) * 2009-07-21 2010-02-26 Actiu Berbegal Y Formas, S.A. Silla de oficina.
GB2544284A (en) * 2015-11-10 2017-05-17 Davidhugh Ltd Release mechanism

Also Published As

Publication number Publication date
US4537445A (en) 1985-08-27
CA1205735A (en) 1986-06-10
JPS59207112A (ja) 1984-11-24

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Inventor name: NEUHOFF, UREDAT